Riverstone
will
take
control
of
about
25%
to
30%
of
Fairfield,
becoming
co-lead
investor
beside
majority
backer
Warburg
Pincus.
Riverstone
will
also
have
the
option
of
subscribing
a
further
$200
million
alongside
future
contributions
from
current
investors.
Former
BP
chief
executive
John
Browne,
head
of
Riverstone’s
European
arm,
and
the
fund’s
managing
director
Ralph
Alexander,
will
take
seats
on
Fairfield’s
board.
Fairfield
chief
executive
Chris
Wright
told
Upstream:
“We
see
this
as
a
very,
very
important
step
in
our
evolution.”
Wright,
who
became
chief
executive
after
Fairfield
abandoned
an
attempt
to
go
public
in
2010,…